I. A. S. Al- Shaarbaf, M. J. H. Al-zubaidi, and E. A. A. Al- Zaidy, “Effect of Hollowing Ratio on the Behavior of Hollow Self-Compacting Reinforced Concrete Slender Column Under Eccentric Loading”, IJET, vol. 7, no. 4.20, pp. 390–394, Nov. 2018, doi: 10.14419/ijet.v7i4.20.26141.